关键词: 溶胶-凝胶法, TiO2薄膜, 乙烯, 废水, 降解

Abstract: The Nanometer TiO2 film was prepared on the glass slide by sol-gel method, and its photocatalytic performance was evaluated through photocatalytic degradation of wastewater from ethylene plant. The results of orthogonal tests showed that the optimum preparation conditions were as follows: 1.2mL water was adding by drops, the volume ratios of TNB to C4H9OH, CH3COOH, and AcAc were 1:10, 5:2 and1:1, respectively; the volume ratio of AcAc to NH(CH2CH2OH)2 was 1:1, using n-butyl alcohol as solvent, two layers of film were loaded, finally, calcination at 420℃, for 1h. Characterization results of XRD and FT-IR indicated that the prepared thin film was a nanometer TiO2 film having anatase structure and with an average particle diameter of 12.49 nm. Said prepared TiO2 film exhibited optimal photocatalytic degradation of ethylene wastewater, when the photocatalytic treating time was 2.5h, the degradation rate reached 84.7%.

Key words: sol-gel method, TiO2 film, ethylene, wastewater, degradation